title: Functionalized graphene for high-performance two-dimensional spintronics devices.
abstract: Using first-principles calculations, we explore the possibility of functionalized graphene as a high-performance two-dimensional spintronics device. Graphene functionalized with O on one side and H on the other side in the chair conformation is found to be a ferromagnetic metal with a spin-filter efficiency up to 54% at finite bias. The ground state of graphene semifunctionalized with F in the chair conformation is an antiferromagnetic semiconductor, and we construct a spin-valve device from it by introducing a magnetic field to stabilize its metallic ferromagnetic state. The resulting room-temperature magnetoresistance is up to 2200%, which is 1 order of magnitude larger than the available experimental values.
authors.affiliation: State Key Laboratory of Mesoscopic Physics and Department of Physics, Peking University, Beijing 100871, People's Republic of China.
authors.forename: Linze
authors.initials: L
authors.lastname: Li
authors.forename: Rui
authors.initials: R
authors.lastname: Qin
authors.forename: Hong
authors.initials: H
authors.lastname: Li
authors.forename: Lili
authors.initials: L
authors.lastname: Yu
authors.forename: Qihang
authors.initials: Q
authors.lastname: Liu
authors.forename: Guangfu
authors.initials: G
authors.lastname: Luo
authors.forename: Zhengxiang
authors.initials: Z
authors.lastname: Gao
authors.forename: Jing
authors.initials: J
authors.lastname: Lu